descriptor | Descriptor is a spec-style test structuring library for rust
kandi X-RAY | descriptor Summary
kandi X-RAY | descriptor Summary
#RUN cargo run --example descriptor.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of descriptor
descriptor Key Features
descriptor Examples and Code Snippets
Community Discussions
Trending Discussions on descriptor
QUESTION
I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).
However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.
I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.
To illustrate this, consider the following code:
...ANSWER
Answered 2021-May-03 at 20:22There is a difference between a file and a file descriptor (FD).
All processes share the same files. They don't necessarily have access to the same files, and a file is not its name, either; two different processes which open the same name might not actually open the same file, for example if the first file were renamed or unlinked and a new file were associated with the name. But if they do open the same file, it's necessarily shared, and changes will be mutually visible.
But a file descriptor is not a file. It refers to a file (not a filename, see above), but it also contains other information, including a file position used for and updated by calls to read
and write
. (You can use "positioned" read and write, pread
and pwrite
, if you don't want to use the position in the FD.) File descriptors are shared between parent and child processes, and so the file position in the FD is also shared.
Another thing stored in the file descriptor (in the kernel, where user processes can't get at it) is the list of permitted actions (on Unix, read, write, and/or execute, and possibly others). Permissions are stored in the file directory, not in the file itself, and the requested permissions are copied into the file descriptor when the file is opened (if the permissions are available.) It's possible for a child process to have a different user or group than the parent, particularly if the parent is started with augmented permissions but drops them before spawning the child. A file descriptor for a file opened in this manner still has the same permissions uf it is shared with a child, even if the child would itself be able to open the file.
QUESTION
I have a third party .war file that I run on a Jetty server. I need to run code for logging purposes before the filters defined in the .war file's deployment descriptor run. The code needs to have access to the incoming request and the response object and to the context of the logger that runs for the app in the war.
Is there a way to do this in Jetty's xml configuration file? I don't want to touch the war file due to concerns about license.
I could override the deployment descriptor which would allow me to add custom filters but I believe these would then run after the filters in the war. I could also use a request customizer but that doesn't give me access to the response which I also need to edit.
I tried adding a handler to a HandlerCollection before the handler with the org.eclipse.jetty.webapp.WebAppContext that runs the war but it doesn't seem that I have access to the web app's logger's context...
Is there any way to do this? So before the web app's servlet executes run a piece of code that can access the incoming request and the response and the web app's context?
...ANSWER
Answered 2021-Jun-15 at 17:41Option 1:
To access the raw Request
and Response
at the various stages of their lifecycles, use the HttpChannel.Listener
(make sure you read the javadoc/apidoc to understand what each event means).
Option 2:
To add a handler in the WebAppContext
, before the Session/Security handling, but after other handlers, use WebAppContext.insertHandler(HandlerWrapper)
.
Option 3:
Create a web-fragment servlet jar that represents your servlet Filter
, and add it to the WebAppContext.setExtraClassPath(String)
, which will be picked up and added to the actual webapp's startup.
Option 4:
Create a custom RequestLog
implementation (that you add to Server.setRequestLog(RequestLog)
that is notified once the request AND response are complete, so you can log the state of the request/log to whatever source you want.
Option 5:
Use one of the existing RequestLog
implementations to log the details you desire to the console in the format you desire. (Look at the combination of CustomRequestLog
and Slf4jRequestLogWriter
)
QUESTION
Im trying to create a multithreaded namedpipe server as outlined in the msdn sample here https://docs.microsoft.com/en-us/windows/win32/ipc/multithreaded-pipe-server but Im trying to restrict the namedpipe to access by adminstrators group members only.
The example works correctly when no SECURITY_ATTRIBUTES structure is specified but when an SA is specified the first call is successful, but following calls to CreateNamedPipe fail as long as the first pipe is listening or communicating with a client. The create call fails, usually with ACCESS_DENIED, but sometimes with error 1305 The revision level is unknown. When the first pipe closes due to client disconnecting the following call will be successful for the next createnamedpipe call but will in turn fail once that pipe has a client.
I have tried multiple values for the grfInheritance field with no avail. This is my first adventure into explicitly specifying SECURITY so forgive me if I have missed something obvious. Note that in the Function that calls createnamedpipe I create a new SA structure with each create attempt but I have also tried creating one and sharing it outside the create loop.
Relevant code follows:
function that creates the pipe:
...ANSWER
Answered 2021-Jun-15 at 02:23According to Named Pipe Security and Access Rights,
In addition to the requested access rights, the DACL must allow the calling thread FILE_CREATE_PIPE_INSTANCE access to the named pipe.
QUESTION
I recently updated flutter sdk to Flutter 2.2.1 and now I am constantly getting this error, it shows one of the classpath is not configured.: **A problem occurred configuring project ':google_sign_in'.
Could not resolve all dependencies for configuration ':google_sign_in:classpath'. Could not load module metadata from C:\Users\myraa.gradle\caches\modules-2\metadata-2.96\descriptors\commons-logging\commons-logging\1.2\a8be1fe3b3911d3d3425fe720cf42835\descriptor.bin Could not get unknown property 'android' for project ':google_sign_in' of type org.gradle.api.Project. **
Please help me out.
This is my pubspec.yaml
...ANSWER
Answered 2021-Jun-12 at 09:48I'd suggest you do the below edits and check if you're getting the same error. Don't forget to run flutter clean and rebuild the project once the modifications are done.
pubspec.ymal
QUESTION
ANSWER
Answered 2021-Jun-14 at 13:00Sure, you can use the API "Test Point - Update" to update the outcome of test points.
For example, I have two test points (id are 22
and 23
) are 'Active
'.
I can use this API to update one to be 'Passed
' and another one to be 'Failed
'.
- Request URI:
QUESTION
I am currently learning DirectX 12 and trying to get a demo application running. I am currently stuck at creating a pipeline state object using a root signature. I am using dxc to compile my vertex shader:
...ANSWER
Answered 2021-Jun-14 at 06:33Long story short: shader visibility in DX12 is not a bit field, like in Vulkan, so setting the visibility to D3D12_SHADER_VISIBILITY_VERTEX | D3D12_SHADER_VISIBILITY_PIXEL
results in the parameter only being visible to the pixel shader. Setting it to D3D12_SHADER_VISIBILITY_ALL
solved my problem.
QUESTION
I encountered something weird while trying C read function. I know file descriptor 0 means standard input. So I decided to take input with read function like below
...ANSWER
Answered 2021-Jun-13 at 17:07Nothing is overflowed. Your program reads one character from stdin and then exits. Any characters after that are read by the shell.
QUESTION
I have defined a ServiceType enumtype and Service itemtype in trainingcore-items.xml.
...ANSWER
Answered 2021-Jun-12 at 15:16This question is related to your another question: How to localize a custom type created in trainingcore-items.xml in Hybris?
Just change type="localized:ServiceType"
to type="ServiceType"
and it will be fine.
QUESTION
Let's say I calculate the keypoints and descriptors of a given image, for example with the ORB algorithm.
...ANSWER
Answered 2021-Jun-12 at 08:39The keypoints are a list of objects of type Keypoint
, which comes from C++. You can access its public attributes as kp[0].pt
, for the 2D position of the keypoint, for example. You can find the list of public attributes in the documentation.
The descriptors, on the other hand, are just a list of lists, each with 32 elements.
QUESTION
I am writing a similar task manager app, i have some issues when working with BLoC:
- First, I create a Page to show all the task that have been added by pressing the FloatingActionButton() below.
- Next, when the user finished the form by hitting the FlatButton on the top right which is called SAVE, it will be submitted to Firestore, by the _submit() method in the JobForm class.
- NOTE: I also added some validator to validate the NameForm and the RatePerHourForm so it will show an error when they are null and they worked very well.
- I used a StreamBuilder() to update my JobPage() ( the first screen ), everywhen the data from Firestore changed.
- That was a summary of what I am trying to do.
BUT, when the user press the SAVE button, the Name Field and the ratePerHour Field is always empty even when i called onChanged: , in every TextField() to update them.
HERE IS MY flutter doctor:
...ANSWER
Answered 2021-Jun-12 at 07:19The issue is with the updateWith
method of the JobFormBloc
.
Currently you have this below:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install descriptor
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page